Optical imaging lens assembly
The present disclosure discloses an optical imaging lens assembly. The optical imaging lens assembly includes, sequentially from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The first lens has a positive refractive power and a convex object-side surface. The second lens has a negative refractive power. The third lens has a positive refractive power. Each of the fourth lens and the fifth lens has a positive refractive power or a negative refractive power. The sixth lens has a positive refractive power. The seventh lens has a negative refractive power, a concave object-side surface and a concave image-side surface. A combined focal length f12 of the first and second lenses and a combined focal length f34 of the third and fourth lenses satisfy: |f12/f34|≤0.3.
1. An optical imaging lens assembly comprising, sequentially from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens,
wherein the first lens has a positive refractive power, an object-side surface of the first lens is a convex surface, and an image-side surface of the first lens is a convex surface;
the second lens has a negative refractive power;
the third lens has a positive refractive power;
each of the fourth lens and the fifth lens has a positive refractive power or a negative refractive power;
the sixth lens has a positive refractive power;
the seventh lens has a negative refractive power, and an object-side surface and an image-side surface of the seventh lens are concave surfaces; and
a combined focal length f12 of the first lens and the second lens and a combined focal length f34 of the third lens and the fourth lens satisfy: |f12/f34|≤0.3,
wherein an effective focal length f2 of the second lens and an effective focal length f7 of the seventh lens satisfy: 4.5<f2/f7<11.0.
2. The optical imaging lens assembly according to claim 1 , wherein a total effective focal length f of the optical imaging lens assembly and an entrance pupil diameter EPD of the optical imaging lens assembly satisfy: f/EPD≤1.80.
3. The optical imaging lens assembly according to claim 1 , wherein a total effective focal length f of the optical imaging lens assembly and the effective focal length f7 of the seventh lens satisfy: −2.5<f/f7<−1.5.
4. The optical imaging lens assembly according to claim 3 , wherein an effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens satisfy: −1.5<f6/f7<−1.0.
5. The optical imaging lens assembly according to claim 3 , wherein the effective focal length f7 of the seventh lens and a radius of curvature R14 of the image-side surface of the seventh lens satisfy: −1.5<f7/R14<−1.0.
6. The optical imaging lens assembly according to claim 1 , wherein an effective focal length f1 of the first lens and a radius of curvature R1 of the object-side surface of the first lens satisfy: 2.0<f1/R1<3.0.
7. The optical imaging lens assembly according to claim 1 , wherein a center thickness CT1 of the first lens on the optical axis and the effective focal length f2 of the second lens satisfy: −0.2<CT1/f2<0.
8. The optical imaging lens assembly according to claim 1 , wherein an effective focal length f6 of the sixth lens and an effective focal length f3 of the third lens satisfy: 0<f6/f3<0.5.
9. The optical imaging lens assembly according to claim 1 , wherein a radius of curvature R1 of the object-side surface of the first lens and a radius of curvature R4 of an image-side surface of the second lens satisfy: 0<R1/R4<1.
10. The optical imaging lens assembly according to claim 1 , wherein a radius of curvature R12 of an image-side surface of the sixth lens and a radius of curvature R14 of the image-side surface of the seventh lens satisfy: −1.5<R12/R14<−0.5.
11. The optical imaging lens assembly according to claim 1 , wherein a center thickness CT6 of the sixth lens on the optical axis satisfies: 0.3 mm<CT6<0.8 mm.
12. The optical imaging lens assembly according to claim 11 , wherein a total track length TTL of the optical imaging lens assembly and half of a diagonal length ImgH of an effective pixel area on an image plane of the optical imaging lens assembly satisfy: TTL/ImgH≤1.50.